/Engine/Source/Runtime/Slate/Public/Framework/MultiBox/MultiBox.h
Called when a user drags a UI command into a multiblock in this widget
void OnCustomCommandDragEnter ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< const [FMultiBlock](API\Runtime\Slate\Framework\MultiBox\FMultiBlock) > MultiBlock, const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & MyGeometry, const [FDragDropEvent](API\Runtime\SlateCore\Input\FDragDropEvent) & DragDropEvent )